The Performance Hunt

1. What is the first step you should take when users report that an app has become slow?

Check application logs for errors Measure the performance metrics Increase server capacity Assume it needs caching

2. Why is it important to look at p95 latency instead of average response time?

P95 latency reflects the experience for all users Averages can hide performance issues experienced by most users P95 is easier to calculate than averages Average response time is not relevant in performance measurement

3. Which of the following is a common performance issue associated with Entity Framework?

Excessive CPU usage N+1 queries High memory consumption Slow external API calls

4. What is the correct way to prove the effectiveness of a performance fix?

Compare performance on different servers Measure latency only after user feedback Capture the baseline, change one thing, and re-measure Increase the load on the server

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